Automatic exposing apparatus for both sides and exposing method thereof for works

ABSTRACT

To provide the automatic both sides exposing apparatus  1  comprising: the first exposing mechanism  10  and the second exposing mechanism  20;  a carrying in portion  2  and a carrying out potion  30;  an optical system, through which either side of the substrate contacted closely with the mask is exposed; the first holder A and the second holder B, wherein each of the first holder A and the second holder B has a holding means for holding the substrate and the substrate is delivered to the second holder B from the first holder A with reversal of two sides at a spot which is located in an interval of the first exposing mechanism and the second exposing mechanism and where both holders meet each other to provide an automatic both sides exposing apparatus, wherein a frequency that the substrate is delivered is minimized, where the substrate can be turned over without the reversing mechanism, where the substrate can be transferred (and delivered) at good efficiency in limited space, and exposed accurately, further any inconvenient origin for the substrate is able to be minimized and where it is all made compact.

BACKGROUND OF THE INVENTION

[0001] 1. Field of the invention

[0002] The present invention relates to an automatic exposing apparatus for two sides of a work and a method of exposing thereof, in which a substrate is exposed with a fixed pattern on both sides respectively through a mask by irradiation of ultraviolet rays.

[0003] 2. Prior art

[0004] Recently, there have been offered various kinds of automatic exposing apparatus of exposing a work on two sides to expose a substrate with a predetermined pattern by irradiation of ultraviolet rays that have a fixed wavelength. As for the current automatic exposing apparatus said above, for example, there is the apparatus suggested, to which a substrate transfer mechanism is applied, in which the substrate is transferred by a handler that moves coming and going, and that provides suction pads for holding thereof, and besides, there is also the other mechanism applied, in which the substrate is transferred by a driving roller or a driving belt, on which the substrate is mounted.

[0005] And when the substrate is exposed on both sides after aligning by each side thereof respectively, it is general to comprise first exposing the substrate on one side, then reversing or turning over the substrate from upper surface to under surface by a reversing device provided in the substrate transfer route, and again, exposing the substrate on another side which is transferred by the substrate transfer mechanism.

[0006] In addition, various constitution of the light source mechanism, the optics reference such as a reflector, fly-eye-lens, or cooling mechanism and the like must be arranged in the inside of the apparatus and it is necessary to secure the substrate transfer route and the substrate transfer mechanism.

[0007] Accordingly, as for the current automatic exposing apparatus of exposing a work on two sides, there is the extremely complicated constitution picked up.

SUMARY OF THE INVENTION

[0008] However, as for the current automatic exposing apparatus said above, there is the place to be improved further. So that it is necessary to solve the problem as follows.

[0009] (1) As for the current automatic exposing apparatus for exposing on two side of a work (or called “˜automatic both side exposing apparatus” as follows, when there is the substrate transfer mechanism suggested, in which the function is owed to the handler, the carrying-out roller, and the like, since there is the number of performing delivery in the route increased, due to the constitution, in which the substrate is delivered thereto in case of each serial process such as the substrate transfer, the aligning, the exposing and the like, it becomes necessary to secure both a delivery space and a delivery time, so that it comes to that the opportunity when dust sticks to the substrate increases. Therefore, the constitution that has seemed to hold the delivering movement of the substrate in check in a minimum has been expected.

[0010] (2) As for the current automatic both side exposing apparatus said above, since the substrate transfer mechanism thereof is complicated, and more, there is a reverse constitution to let the substrate turn over provided separately, it is inconvenient to be obliged to enlarge the whole same in order to maintain area enough to supply for the construction said above.

[0011] (3) There is the constitution of the automatic both sides exposing apparatus using the collimator reflecting light as parallel light indicated here by Japanese Patent Examined Publication No.1995-78630, and, according to the constitution, the collimator reflecting system is to be put and arranged between two substrates.

[0012] However, due to said above constitution, in order to expose the substrate on two side, it is required to provide the reversing device to reverse or turn over the substrate from upper surface to under surface. And also, it is required for the handler to deliver the substrate to another printing frame.

[0013] Consequently, the expansion of the apparatus has not been able to be avoided by the establishment of mechanism for turning over the substrate and increase of frequency that the substrate is delivered, as above mentioned.

[0014] In view of the forgoing problems, the present invention is suggested.

[0015] An object of the present invention is to provide an automatic exposing apparatus of exposing a work on two sides, wherein a frequency that the substrate is delivered is minimized, where the substrate can be turned over without the reversing mechanism, where the substrate can be transferred (and delivered) at good efficiency in limited space, and exposed accurately, further any inconvenient origin for the substrate is able to be minimized and where it is all made compact.

[0016] According to the present invention, there is an automatic exposing apparatus of exposing a work on two sides provided, which comprises the first exposing mechanism and the second exposing mechanism, which has a mask respectively, a carrying in portion for the substrate and a carrying out portion for the substrate, which are arranged both by the first exposing mechanism and by said second exposing mechanism respectively, a first holder, in which the substrate is fixed and a side of the substrate is exposed through the mask stuck tight on said side through one optical system and the second holder, in which the substrate is fixed and another side of the substrate is exposed again through the mask stuck tight on said side through the other optical system.

[0017] Further, wherein there are the first holder and the second holder provided, which, respectively, has a holding means to hold the substrate through and there is a place for delivering the substrate provided, to which each of both said first exposing mechanism and said second mechanism is opposite respectively, and in which the substrate is delivered to the second holder from the first holder, wherein the substrate is turned over from upper surface to under surface.

[0018] With the constitution mentioned above, as to the automatic both sides exposing apparatus according to the present invention, each of the first and the second holders thereof has not only a working as a printing frame but also a working as the substrate reversing or turning over device.

[0019] Furthermore, as for said first holder of the automatic both sides exposing apparatus, there is formed the first driving course that is made from said carrying in portion by the first exposing mechanism to said delivering place of the substrate, in which there is the first holder moved with holding the substrate.

[0020] As for said second holder thereof, it moves in the second driving route that is formed from the delivering place of the substrate by the second exposing mechanism to said carrying out portion in condition of holding the substrate delivered from the first holder.

[0021] With the construction made in this way, as to the automatic both sides exposing apparatus, there is the substrate provided, which is not only transferred from the carrying-in portion to the carrying out portion by the first and the second holders, but also, turned over from upper surface to under surface by the same and exposed by the first and the second exposing mechanisms that collaborates with the first and the second holders respectively.

[0022] Furthermore, as to said holding means for the substrate of the automatic both sides exposing apparatus, there is provided a negative adsorbing mechanism such as a vacuum suction mechanism or an adsorption mechanism based on Bernoulli theorem, in which the substrate is supported tight or held in the holder by the negative pressure.

[0023] Besides, as to the first exposing mechanism and the second exposing mechanism of the automatic both sides exposing apparatus, each mechanism comprises a transparent plate holding said mask, an alignment mechanism, in which the transparent plate is moved so as to match a position of the mask to that of the substrate, a supporting frame mechanism holding the alignment mechanism, a working mechanism, which can let the supporting frame move in the direction of the substrate.

[0024] With the constituted in this way, in each of the first exposing mechanism and the second exposing mechanism, it is possible that the mask is stuck to or near contact with the substrate by virtue of said working mechanism, and that a gap of a position between the substrate and the mask is confirmed and an alignment of the mask and the substrate is to be performed, and the substrate is able to be exposed in accordance with the mask.

[0025] Moreover, as to the automatic both sides exposing apparatus, there is a holding side sliding mechanism provided with, in which one of both the first holder and the second holder at least slides or moves the substrate held by said holding means in the direction of another holder side.

[0026] With the constitution made in this way, there is a slipping or positional deviation of the substrate minimized, when it is slid or moved, and there are more transfer or driving routes of the substrate to be prepared.

[0027] Further more, as for the first holder and the second holder which are operated and moved in the automatic both sides exposing apparatus, there is at least one of moving loci thereof fappeared by shape of rectangle, which is made of two straight long lines and two short straight lines. And also the both holders are to meet each other in one of the short straight lines for delivering of the substrate. With this structure, since the first holder and the second holder can move and operate independently in each driving route respectively, shortening of the takuto taimu is possible, and the efficiency can work well.

[0028] Moreover, as for each of said both holders of the automatic both sides exposing apparatus, there is a circulation moving mechanism provided with for its moving, which comprises a supporting arm holding one of the both holders respectively, a move control body having the supporting arm and each carrying rail for moving the first holder or the second holder through one of the moving control bodies respectively.

[0029] As constituted in this way, each of the holders moves fast along the rail, while the substrate keeps in good position.

[0030] Besides, as for an optical system of the automatic both sides exposing apparatus, there is a collimator reflecting mirror arranged outer side than the position at which the substrate is exposed, provided that the position is determined as “inside”.

[0031] With the construction built in this way, by joint work of both exposing mechanisms and both holders, it is possible to expose the substrate on two sides at higher efficiency.

[0032] Furthermore, according to another important object of the present invention, there is a method of exposing the substrate on two sides suggested, which comprises first for the substrate to be delivered to the first holder in the carrying in portion, for the first holder to be moved to an exposing treating position while holding the substrate and to be stooped there, for the first exposing mechanism to be advanced before the substrate and for the substrate to be stuck on a mask held by the transparent plate, for an alignment of the mask and a side of the substrate to be performed, due to confirming the positional difference between the mask and the substrate through a camera, for the side of the substrate to be exposed on through the mask by parallel light from a collimator reflecting mirror.

[0033] Subsequently, which comprises for the adsorption between the substrate and the mask to be released, for the substrate held by the first holder to be faced at the second holder moved from a (evacuation) position at which the second holder has taken refuge and for each of both sides of the substrate to be stuck on each of both holders respectively, wherein one holder moves at least in direction of each other, so that for the substrate to be delivered from the first holder to the second holder with the face and the back exchanged.

[0034] Furthermore, for the first holder delivered the substrate to be let move in the direction of the carrying in portion, while the second exposing mechanism is slid to the substrate held by the second holder and the mask held on the transparent plate is stuck on the substrate, and after confirming the positional difference between the mask and the substrate by camera, for the alignment to be performed, for the another side that is aligned of the substrate to be exposed by parallel light reflected on the collimator reflecting mirror through the mask of the second exposing mechanism and after the coherence with the substrate and mask is removed, for the substrate held by the second holder to move in the carrying out portion, where the substrate is took out.

[0035] Owing to the mentioned above constitution, as for the substrate, there is the frequency that it is delivered to each of both holders minimized and the face and back thereof can be exposed.

BRIEF DESCRIPTION OF THE DRAWINGS

[0036]FIG. 1 is a figure of general view, partly in cross section, of an automatic exposing apparatus of exposing a work on two sides according to the present invention.

[0037]FIG. 2 is consisted of (a), (b) and (c), which are respectively a showing step by step change of locating of both a first holder A and a second holder B or in a place where exposing treatment is performed according to the present invention.

[0038]FIG. 3 is consisted of (a) and (b), which is respectively a sectional view and a plane view to show a matching or aligning mechanism that is common to both the first exposing mechanism and the second exposing mechanism according to the present invention.

[0039]FIG. 4 is a plan view to show the whole of a transparent plate for the exposing mechanism A or B according to the present invention.

[0040]FIG. 5 is consisted of (a) and (b), which are respectively a side elevation view and a plan view showing a construction of the carrying-in portion according to the present invention.

[0041]FIG. 6 is consisted of (a), (b) and (c), which is respectively a figure of general view to show a procedure to expose the substrate step by step according to the present invention.

[0042]FIG. 7 is consisted of (a), (b) and (c), which is respectively a figure of general view to show a procedure to expose the substrate step by step according to the present invention.

[0043]FIG. 8 is consisted of (a), (b) and (c), which is respectively a figure of general view of the other form of the drive route provided in an automatic exposing apparatus of exposing a work on two sides according to the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENT

[0044] Referring now to a preferred embodiment, this invention will be described in further detail with reference to the accompanying drawings.

[0045]FIG. 1 is a figure of general view, partly in cross section, of an automatic exposing apparatus of exposing a work on two sides according to the present invention.

[0046] As shown in FIG. 1, an automatic exposing apparatus of exposing a work 1 comprises a carrying-in portion 2 for a substrate W, a first holder A having a driving means, by which the substrate W is conveyed or transported from the carrying-in portion 2, as well as a holding means for the substrate, a first exposing mechanism 10, in which one of both sides of the substrate W is exposed in conjunction with the first holder A, a second holder B, to which the substrate W is delivered from the holder A, after exposed on the one side thereof and also has a driving means for the substrate W, a second exposing mechanism 20, in which the other side of the substrate W is exposed in conjunction with the second holder B, a carrying-out portion 30, in which the substrate W is carried out after exposing the substrate W on two sides.

[0047] According to the present invention, as for an automatic exposing apparatus of exposing a work on two sides 1, referring to the case that there is the substrate W lain perpendicularly and transported or exposed as it is, description is following.

[0048] As for the carrying-in portion 2, as shown in FIG. 5(a), there is the substrate W entered into said apparatus 1 through a carry-in roller 2 a, still sent by a sending roller 2 b, and located preparatorily in collaboration with a preliminarily locating pin 4 a, 4 b, due to a preparative locating mechanism 4 and then, owing to a transfer means 3, the substrate W is adsorbed fixedly and transferred to the first holder A.

[0049] Wherein, as shown in FIGS. 5(a), (b), as for the transfer means 3, there is an adsorption arm 3 b arranged to a stand under the level of the sending roller 2 b that supports the substrate, and as mentioned above, when

[0050] the preliminary positioning is performed, the adsorption arm 3 b is gone up to the level of the substrate and then the adsorption arm 3 b holding the substrate fixedly turns around an ascent and descent axis part 3 a in order to transfer the substrate W to the first holder A as stands by the place.

[0051] Referring to FIG. 1 and FIG. 2, as to the first holder A and the second holder B, their description is following, wherein because the second holder B is the same in mechanism as the first holder A, as a principle only the first holder A is explained about.

[0052] As for the first holder A, there is a sucking mechanism 5A provided, which comprises a suction side 5 a having a plurality of a sucking hole 5 d for absorbing the substrate W fixedly, a vacuum pump 5 e, which is connected to said suction side 5 a through a leak valve 5 f, or the like. And in said suction mechanism 5A the substrate W does not cause transformation at all due to the suction mechanism 5A in spite of thickness of the substrate.

[0053] Moreover, as shown in FIG. 2, as for the first holder A, there is a spring 5 c provided, in order to moderate a shock at receiving the substrate.

[0054] As to the holder A, there is proposed a first driving route R1 as a route of moving locus thereof, which is arranged between the carrying-in portion 2 and a exposing section which includes the first exposing mechanism 10 and the second exposing mechanism 20.

[0055] Due to a circulation moving mechanism 6 formed along the route, the first holder A with holding the substrate W can move along the route.

[0056] As for the second holder B, there is a second driving route R2 proposed, which is arranged between the exposing section which includes both the first and the second exposing mechanisms 10, 20 and the carrying-out portion 30.

[0057] In addition, the substrate W is delivered from the first holder A to the second holder B at a place in the exposing section, particularly now in the second exposing mechanism.

[0058] Hereupon, as for said both routes, there is a part overlapped each other provided, which corresponds to a part included in common by both short straight lines R1 b and R2 b (as will be seen later, referring to FIG. 6, FIG. 7).

[0059] As shown in FIG. 1, FIG. 2, the circulation moving mechanism 6 comprises: a carrying rail 7; a moving body 8 which moves along the carrying rail 7; and a supporting arm 9, which is supported by the moving body 8 and supports the first holder A, wherein a carrying rail 7 includes a driving rail 7 a equipped with a drive motor such as a servomotor (not shown) for moving the moving body 8 in accuracy, and a slave rail 7 b.

[0060] As for a moving body 8, it comprises: an engagement portion 8 a, with which the carrying rail 7 a, 7 b are engaged respectively; a moving support table 8 b, under which the engagement portion 8 a, 8 a are formed fixedly, a sliding mechanism 8 c formed on the moving support table 8 b.

[0061] As to the sliding mechanism 8 c, it has a driving motor (not shown) and by which the moving support table 8 b is able to move along in the direction perpendicular to that of moving along the carrying rail 7.

[0062] And there is no holder trembling with moving along the route because it is held up by the supporting-arm 9.

[0063] Besides, as foregoing mentioned with preferring to FIG. 6 and FIG. 7, there is the first driving route R1 or a moving locus of the first holder A suggested, which comprises: two straight long routes R1 a, R1 c which correspond respectively to a route between the carrying in portion 2 and the first exposing mechanism 10, and to a route between the second exposing mechanism 20 and the carrying in portion 2; two straight short routes R1 b, Rid which correspond respectively, to a route in the exposing section that includes both exposing mechanisms 10 and 20, and to a route in the carrying in portion so that the first driving route R1 appears shape of rectangle.

[0064] While, as for the second holder, there is the second driving route R2 or a moving locus thereof suggested, which comprises: two straight long routes R2 a, R2 c which correspond respectively to a route between the carrying out portion 30 and the first exposing mechanism 10, and to a route between the second exposing mechanism 20 and the carrying out portion 30; two straight short routes R2 b, R2 d which correspond respectively a route in the exposing section that includes both exposing mechanisms 10 and 20, and to a route in the carrying out portion so that the second driving route R2 appears shape of rectangle.

[0065] Referring to FIG. 1, as to the first exposing mechanism 10 and the second exposing mechanism 20, because the latter is the same in construction as the former, as a principle only the former is explained.

[0066] As shown in FIG. 1, the first exposing mechanism 10 comprises: a transparent plate 11 holding a mask M; a frame 12 supporting the transparent 11; an aligning mechanism 13, in which the frame 12 is not only supported perpendicularly but also is moved for location in the direction of X, Y and θ; a support frame mechanism 17 which supports the frame 12 through the aligning mechanism 13; an actuating mechanism 19 which moves the support frame mechanism 17 in order to let the transparent plate 11 shift its position in front and in rear.

[0067] As for the transparent plate 11, as shown in FIG. 3 and FIG. 4, there is a seal rubber 11 a provided with in its edge side around, together with which there is a space formed around the mask and the substrate when the mask and the substrate come in contact. Owing to handling absorption in the space, a vacuum contact of the mask and the substrate is performed far fixedly.

[0068] Besides, there is the aligning mechanism 13 provided, through which the frame 12 and a hold frame 17 a of the support frame mechanism 17 are connected to each other, and which comprises: a rail guide 14, along which the frame 12 is moved in the direction of X and Y; a driving motor 15, by which the frame 12 is let move for aligning with the mask and the substrate; a roll supporting part 16, by which the frame 12 moved for alignment is supported in location.

[0069] As to the rail guide 14, as shown in FIG. 3 and FIG. 4, there are provided both a rail for X direction 14A which consists of a base portion for moving in direction of X 14 a and a guide for X direction 14 b, and a rail for Y direction 14B which consists of a base portion for moving in direction of Y 14 c and a guide for Y direction 14 d. And more, each of both guides 14 b and 14 d is formed to let the frame 12 move or slide along the rail while the guide is engaged with the rail.

[0070] Further more, as shown in FIG. 4, as to the driving motor 15, there are three motors (a first (15 a), a second (15 b) and a third (15 c)) prepared, which is respectively arranged at each center of three edges of the frame 12, provided that either of the first motor 15 a and the third motor 15 c moves the base portion for moving in direction of Y 14 c or the frame 12 along the guide for X direction 14 b, and that the second motor 15 b moves the frame 12 along the guide for Y 14 d.

[0071] Accordingly, due to appropriate actuating control of the plural driving motors 15, there is the frame 12 let move in the direction of X, Y and θ.

[0072] As to a device for the frame 12 to move in the direction of X, Y and θ, as shown in FIG. 3, there is provided the roll supporting potion 16 inside and around the frame 12, which comprises: a base terminal portion 16 a; a roll spindle 16 b which is arranged inside of the base terminal portion 16 a; a rolling potion 16 c which does a bearing of the roll spindle 16 b; a roll accepted part 6 d, which is formed inner part of the frame 12 and supports the roll portion 16 c with free turn and is connected fixedly to the outer part thereof.

[0073] As shown in FIG. 1 and FIG. 3, the support frame mechanism 17 supporting the frame 12 through the aligning mechanism 13 comprises: the hold frame 17 a which holds the base portion for moving in the direction of X 14 a; a moving base 17 b, which supports the hold frame 17 a; a spring part 17 c which is arranged in bottom side of the support frame mechanism 17, through which the moving base 17 b is supported by the actuating mechanism 19; and sliding support portion 17 d which is supported by a holding portion 19 a of the actuating mechanism 19 with slide free.

[0074] In addition, the actuating mechanism 19 has a supporting part 19 b which supports fixedly the holding portion 19 a and a screwed portion 19 c which moves the supporting part 19 b and a control motor 19 d in order to move the screwed portion 19 c by rotating.

[0075] As shown in FIG. 1, there is a camera 18 provided, for which when a vacuum suction of the mask M and the substrate W is performed, a photograph of those locating marks Mm and Wm is taken, which is equipped with at affixed place (for example, a cover frame side, the support frame mechanism 17 and the like) with move free in the direction of X, Y through a move mechanism (not shown) such as a rail or like.

[0076] Accordingly, when a exposing operation is performed, the camera 18 can move from the light field to avoid a trouble for exposing.

[0077] Besides, a picture of those locating marks Mm and Wm that is taken by the camera 18 is shown to a monitor display D in order that a worker can seem to identify by watching it directly. And a image information obtained by the camera 18 is utilized to control an aligning operation of the aligning mechanism 13.

[0078] Further, as shown in FIG. 1, there is an optical system 40 provided, which is arranged each side of the first exposing mechanism 10 and the second exposing mechanism 20 and in which the light respectively guided through each of reflectors, flyeye lens or the like (not shown) generated from light source (not shown) is leaded to a collimator reflector 41, 41, each of which is arranged outer side each of both exposing mechanisms 10 and 20 respectively.

[0079] Accordingly, parallel light reflected on the collimator 41, 41 irradiates in each exposing mechanism 10 or 20 respectively.

[0080] As to the carrying out 30, as shown in FIG. 1, there are a sending roller (not shown) and a transfer means 3 provided, each of which corresponds to the same included in the carrying in portion 2.

[0081] Accordingly, the substrate is took out from the second holder B in the carrying out portion 30 and sent to the next stage.

[0082] Subsequently, the operation of an automatic exposing apparatus for two sides of a work is described as follows.

[0083] As shown in FIG. 5(a), first a substrate W entered into the apparatus 1 through a carry in roller 2 a is still sent up to fixed position by a sending roller 2 b and is let laid there.

[0084] Then, to stop thereof, a preparative locating mechanism 4 of the carrying in portion 2 is actuated and the substrate W is pushed from four sides by preparative locating pins so as to locate preparatorily.

[0085] As shown in FIG. 5(b), after the preparative locating, an adsorption arm 3 b in a transfer means 3 is gone up and the substrate W is delivered from the sending roller 2 b to a sucking side of the adsorption arm 3 b. The adsorption arm 3 b holding the substrate W is turned round by an ascent and descent axis part 3 a and the substrate W is transferred to a first holder A.

[0086] As shown in FIG. 6(a), the first holder A holding the substrate W as it held first moves up to the front of a first exposing mechanism 10 along the straight long route R1 a of a first driving route R1 and stops there.

[0087] As shown in FIG. 6(b) and FIG. 2(b), to the first holder A stopped there, a mask M held on a transparent plate 11 is moved in the direction of the substrate W by an actuating mechanism 19 of the first exposing mechanism 10.

[0088] Thereupon, it is possible to utilize a constitution that the first holder A and the first exposing mechanism come up to each other. Here, for moving the first holder A, there is a sliding mechanism 8 c provided. (see to FIG. 2(b)).

[0089] And now, owing to a spring part 17 c as well as a spring 5 c, the mask M and the substrate W make contact closely each other in condition that the shock has been moderated.

[0090] Furthermore, in case of their contact, there is a space formed around the mask and the substrate through a seal rubber 11 a. Due to sucking air in the space by a vacuum mechanism (not shown), a vacuum contact of the mask and the substrate is performed.

[0091] Then, a photograph that shows both locating marks of the substrate and the mask as Wm and Mm respectively is taken by a camera 18. If it is necessary to perform aligning with the substrate and W the mask M, the alignment is performed by an aligning mechanism 13 under condition that the vacuum contact is released to separate from each other.

[0092] As shown in FIG. 4, when the mask M is let move only in the direction of X, the alignment is performed by actuating both a first motor 15 a and/or a third motor 15 c which lie at opposite place each other in a frame 12, if necessary to move for aligning in the direction of Y or θ, the alignment is performed by actuating one of the first motor 15 a and the third motor 15 c at least and a second motor 15 b.

[0093] According to the apparatus 1 of the present invention, after aligning work finished, the substrate and the mask contact again each other, then under the vacuum contact, aligning accuracy is confirmed by the camera 18. when the aligning accuracy is in tolerance for error, the camera is removed away and an exposing work starts in use of ultraviolet ray with fixed wavelength.

[0094] After exposing work is performed, as shown in FIG. 6(c), after the vacuum contact is released, as well as the first exposing mechanism 10 is moved back by an actuating mechanism 19, the first holder A is slid holding the substrate W along a straight short line R1 b by a sliding mechanism 8 c. (see FIG. 2).

[0095] At this moment, there is a second holder B that is watched and waiting for by the side of a carrying out portion 30 and moved along a straight long route R2 a by a circulation moving mechanism 6, and which stops at a front of the first exposing mechanism 10 and faces the first holder A.

[0096] And more, as shown in FIG. 7(a), as for the apparatus 1 of the present invention, just before the substrate W is stuck on both suction sides 5 a, 5 a of the first holder A and the second holder B, either or both of the first and the second holders are slid by each of the sliding mechanism 8 c.

[0097] Subsequently, as foregoing stated, exchanging a back for a face of the substrate W will be performed, wherein a function to the substrate W of the suction side 5 a of the first holder A is changed for that of the suction side of the second holder B.

[0098] Besides, as above mentioned, as for both holders A and B, in which there is the spring 5 c provided respectively, in order to moderate a shock at coming in contact with the suction side 5 a and the substrate W each other.

[0099] By the constructed in this way, owing to the sucking performance, the substrate W is delivered from the first holder A to the second holder B with a reversal of two sides (the front and back) so that a location difference of the substrate W can be maintained to the minimum.

[0100] As shown in FIGS. 7(a), (b), the first holder A which has delivered the substrate W not only slides back in the direction of a second exposing mechanism 20 side by the sliding mechanism 8 c, but also moves along the straight long route R1 c to the carrying in portion 2.

[0101] While, the second holder B that has been delivered the substrate W to slides forward (in the same direction) along a straight short route R2 b and stops at preliminary point.

[0102] When the second holder B stops there, the second exposing mechanism 20 moves forward to stick a mask M on the substrate W.

[0103] Furthermore, in case of their contact, there is a space formed around the mask and the substrate through a seal rubber 21 a. Due to sucking air from the space by a vacuum mechanism (not shown), a vacuum suction of the mask and the substrate is performed.

[0104] Moreover, a difference of both locations of the mask M and the substrate W are confirmed in a photograph taken by a camera 28.

[0105] If the difference is without tolerance for this alignment, an aligning work is performed again with an aligning mechanism 23 in the same way as described referring to FIG. 6(b), then after an aligning accuracy is confirmed, an exposing work is performed.

[0106] At this moment, as shown in FIG. 7(c), the first holder A is transferred a new substrate to in the carrying in portion 2, and moves to the front of the first exposing mechanism 10, hereinafter, there are movements repeated again, which is shown in FIG. 6(a)˜FIG. 7(b).

[0107] Besides, as for the first holder A holding the new substrate, there is a space still maintained, enough to move it up to the front of the first exposing mechanism 10, when both of the second holder B and the second exposing mechanism 20 perform an exposing work jointly.

[0108] The substrate W finished by exposing in two sides is moved held by the second holder B along the straight long route R2 c up to before a carrying out portion 30, to which the substrate is transferred through a transfer means 3, and is sent out to a next stage.

[0109] The second holder B is moved along a strait short route R2 d through a sliding mechanism 8 c and stands ready to come in again until the exposing work is finished performing to the end in collaboration with the first holder A and the first exposing mechanism 10.

[0110] And owing to movements shown in FIG. 6(b)˜FIG. 7(c), a repeating exposure of the substrate W is performed.

[0111] Accordingly, since the substrate W is moved held on both the first and the second holders A and B during move from the carrying in portion 2 to the carrying out portion 30, delivery frequency of the substrate becomes a minimum.

[0112] As to both driving routes R1 and R2 of respective holders A and B, FIGS. 8(b), (c) show respectively a route formed by form of rectangle and another route formed in shape of a straight line as coming and going route (not shown except for arrow).

[0113] By constituting in this way, owing to the same holders A and B, as well as the same exposing mechanisms 10 and 20, as to exposing the substrate on two sides, delivery or transfer frequency of the substrate becomes also a minimum.

[0114] Hereupon, since either of the driving lines R1 and R2 is in shape of the straight line as above mentioned, as for the exposing mechanisms 10 and 20, there is a movement distance to the substrate controlled, which is respectively both that to front and to the rear are more extended.

[0115] Besides, as for the present apparatus 1, if relative positions of the carrying in potion 2 and the carrying out potion 30 are arranged shown in FIGS. 8(a), (b), it is useful for workers to perform the maintenance thereof.

[0116] According to this apparatus of the present invention, though the substrate is moved and exposed with the perpendicular, if it is moved and exposed with the horizontal, there is no transfer means 3.

[0117] Furthermore, as for the present apparatus, because there is a preliminary locating mechanism provided in the carrying in portion, the aligning work in an aligning mechanism is performed in haste and precisely.

[0118] In addition, as to this apparatus of the present invention, there is no need of a device for traversing the substrate, so that a compact apparatus can be obtained.

[0119] Besides, as to a holding means, with which a holder of this invention holds the substrate, as foregoing stated, a vacuum suction, an adsorption mechanism based on Bernoullior theorem like as a negative adsorbing method, and mechanical holding method are able to be put in use.

[0120] More further, as for close contact of the mask and the substrate when in aligning or in exposing the substrate, vacuum suction is not limited as a contact method therefore, for example, a proximity method or system can be of use.

[0121] Accordingly, this invention plays the following effects that are superior in.

[0122] (1) As for the automatic both side exposing apparatus, by joint work of the first holder and the second holder, which serve as a printing frame and a turning over mechanism, and that of the first exposing mechanism and the second exposing mechanism, both sides of the substrate are exposed, so that a delivering movement of the substrate can be reduced.

[0123] Therefore, there is a cause to let dust stick to the substrate lowered down, and the exposure can handle the substrate smartly, so that the yield efficiency of the substrate can improve.

[0124] And, at the time of turning over/delivering of the substrate, aligning work by the second exposing mechanism can be performed quickly because it is positioned at the time of exposing work of one side of a base already.

[0125] (2) As for the automatic both sides exposing apparatus, the substrate is maintained held by the first holder and/or the second holder from sending in the carrying in portion to the carrying out portion and is handled with movement, exposure and it is turn over.

[0126] Therefore the automatic both sides exposing apparatus can do the delivering or transfer frequency of the substrate with a minimum.

[0127] (3) Because each holder possesses a negative adsorption means, as for the automatic both sides exposing apparatus, it can be maintained for the correspondence to the substrate of various kinds of thickness.

[0128] (4) As for the first exposing mechanism and the second exposing mechanism of this apparatus, because each of those mechanisms moves in the direction of the substrate by each appropriate timing in case that the substrate is laid before exposure handling position predetermined, the efficiency can perform serial operation of a sending/conveyance of the substrate, an aligning work, an exposure handling and a carrying out/conveyance smartly.

[0129] (5) As for the automatic both sides exposing apparatus, since there is provided a suction side move method as the sliding mechanism in one of both holders A and B at least, by which the suction side stuck the substrate to can be moved or slid forward or back in the direction of the substrate, it is possible to form many arrangements about the move or slide distance or the like thereof.

[0130] Accordingly, it is possible to establish routes of combination for both holders A and B by various forms.

[0131] (6) As for both the first holder and the second holder of the automatic both sides exposing apparatus, since there is provided at least one driving route formed in shape of rectangle, and it is only in case of performing the delivery of the substrate that both holders meet each other and perform joint work, the first holder and the second holder are possible to act freely independently for smart exposure, so that the operation that the efficiency is good for becomes possible.

[0132] (7) As for the automatic both sides exposing apparatus, both holders can be let move along the driving route by each circulation moving mechanism to have a rail conveying both holders.

[0133] Accordingly, as well as conveyance state of the substrate is done with a vertical course, it can be done with a horizontal direction thereof.

[0134] (8) As to the automatic both sides exposing apparatus, there is an exposing position for the substrate provided, which is established with each inside of the both collimator reflecting mirrors arranged around the position thereof, so that the delivery efficiency of the substrate by both holders can be raised.

[0135] (9) Because it is not necessary to use a handler for delivering the substrate and there is not a turning over work manufacturing process, according to this both sides exposing method, the delivering movement or frequency of the substrate can be suppressed in a minimum, and adhesion cause of dust for the substrate is let decreased, and transformation of the substrate or a cause of delivering mistake can be held in check in minimum as well, miniaturization of the apparatus and the prime cost thereof can be reduced. 

What is claimed is:
 1. An automatic exposing apparatus of exposing a work on two sides comprising: a first exposing mechanism and a second exposing mechanism, each of which has a mask respectively; a carrying in portion for a substrate and a carrying out portion for the substrate, which are formed in a neighborhood of the first exposing mechanism and the second exposing mechanism respectively; a first holder, in which the substrate is fixed closely and a side of 7the substrate is exposed through the mask stuck tight on said substrate through one optical system; and a second holder, in which the substrate is fixed closely and another side of the substrate is exposed again through the mask stuck tight on the substrate through the other optical system, wherein the first holder and the second holder have respectively a holding means to hold the substrate and the substrate is delivered from the first holder to the second holder with reversal of two sides at a place, to which each of said first exposing mechanism and said second exposing mechanism faces respectively.
 2. An automatic exposing apparatus of exposing a work on two sides according to claim 1, wherein said first holder thereof moves in a first driving course that is arranged from said carrying in portion to the first exposing mechanism and to the place for delivering the substrate with holding the substrate, and the second holder thereof moves in the second driving route that is formed from the delivering place to the second exposing mechanism and to the carrying out portion with holding the substrate.
 3. An automatic exposing apparatus of exposing a work on two sides as in either claim 1 or claim 2, further comprising said holding means is a negative adsorbing mechanism, in which the substrate is held in the holder by the negative pressure.
 4. An automatic exposing apparatus of exposing a work on two sides as in any one of the preceding claims, in which the first exposing mechanism and the second exposing mechanism comprise respectively: a transparent plate holding said mask; an alignment mechanism, in which the transparent plate is located so as to match a position of the mask to that of the substrate; a supporting frame mechanism holding the alignment mechanism; a working mechanism, which can let the supporting frame move in the direction of the substrate.
 5. An automatic exposing apparatus of exposing a work on two sides as in any one of the preceding claims, in which a holding side sliding mechanism is provided with, in which one of both the first holder and the second holder at least slides the substrate held by said holding means in the direction of another holder.
 6. An automatic exposing apparatus of exposing a work on two sides as in any one of the preceding claims, in which as to both the first holder and the second holder, at least one of moving loci thereof is formed by form of rectangle, having two straight long lines and two short straight lines, and at a place in the latter the both holders are to meet each other.
 7. An automatic exposing apparatus of exposing a work on two sides as in any one of the preceding claims, in which there is provided a circulation moving mechanism to each of the holders for moving the each holders respectively, which comprises: a supporting arm, which holds each of the both holders respectively; a move control body, which has the supporting arm; a carrying rail, on which the move control bodies mounted for moving.
 8. An automatic exposing apparatus of exposing a work on two sides as in any one of the preceding claims, in which there is a collimator reflecting mirror arranged outer side than the position at which the substrate is exposed, provided that the position is determined as “inside”.
 9. A method of exposing the substrate on two sides, which comprises: first step, in which the substrate is transferred to the first holder in a carrying in portion; second step, in which the first holder is moved up to an exposing treating position while holding the substrate as it holds first; third step, in which the first exposing mechanism is advanced before the substrate and the substrate is stuck tight on the mask held by the transparent plate; fourth step, in which an alignment of the mask and a side of the substrate is performed, due to confirming the positional difference between the mask and the substrate through a camera; fifth step, in which the side of the substrate after the aligning finished is exposed on through the mask by parallel light from a collimator reflecting mirror; sixth step, in which the substrate that is removed from adsorption with the mask and is separated from the mask and faces the second holder moved from the other position, and an either holder moves at least in the direction of each other and the substrate is stuck tight on both sides by both holders respectively, so that the substrate is delivered from the first holder to the second holder with reversal of two sides; seventh step, in which the first holder delivered the substrate is let move in the direction of the carrying in portion, while the second exposing mechanism is slid to the substrate held by the second holder and the mask held on the transparent plate is stuck on the substrate; Eighth step, in which after confirming the positional difference between the mask and the substrate by camera, the alignment is performed; Ninth step, in which another side that is aligned of the substrate is exposed by parallel light reflected on the collimator reflecting mirror through the mask of the second exposing mechanism and after the adsorption with the substrate and mask is removed, the substrate held by the second holder is let move in the carrying out portion, where the substrate is carried out. 